Studies in patients with intracranial hypertension have shown a good relationship between optic nerve sheath diameter measured by retrobulbar ultrasound and invasively measured intracranial pressure. The aim of this study was to evaluate changes in optic nerve sheath diameter before and after drainage of cerebrospinal fluid in patients with hydrocephalus.

both optic nerve sheath diameter (the posterior 3mm of the papilla) [ Time Frame: from induction of general anesthesia to average 15 min after recovery of general anesthesia ] [ Designated as safety issue: No ]

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Please refer to this study by its ClinicalTrials.gov identifier: NCT01863329